Develop Reference

Android - How to detect "Power Save mode" in Huawei or other devices? [duplicate]

I am currently implement a feature where the users are requested to ignore battery optimisation for the application. The reason for doing so, is that the main functionality of the application is unfortunately drastically affected by power save mode.
To achieve my goal, I prompt the users by creating an Intent and setting the Action to ACTION_REQUEST_IGNORE_BATTERY_OPTIMIZATIONS.
Although, before firing the Intent, I both check for isPowerSaveMode() and isIgnoringBatteryOptimizations() to ensure that I don't prompt the users when power save mode is not enabled; which is a requirement for the feature. The way I do so is by:
PowerManager pm = (PowerManager) getSystemService(Context.POWER_SERVICE);
boolean isPowerSaveMode = pm.isPowerSaveMode(); // always returns false for Huawei devices
This works fine for the most devices, but for Huawei devices, isPowerSaveMode() always returns false. Consequently, since the preconditions fail, the prompt is never shown.
Has anyone else possibly encountered this issue? If so, what did you do to solve it?
As a note, the same issue is also present in the Xamarin.Android SDK.

Some Chinese ROM like Huawei or Xiaomi didn't implement the standard API for power save mode query. But like other system settings, a state flag will be saved to database when user turn power save mode on/off.
So we can utilize this state flag to solve the compatibility problem. Also a specific intent will send by system when toggle power save mode, we can listen this intent action to monitor power save mode changing.
Below is the detailed kotlin code implementation for Huawei or Xiaomi devices.
object PowerManagerCompat {
private const val TAG = "PowerManagerCompat"
interface PowerSaveModeChangeListener {
/**
* will be called when power save mode change, new state can be query via [PowerManagerCompat.isPowerSaveMode]
*/
fun onPowerSaveModeChanged()
}
private val POWER_SAVE_MODE_VALUES = mapOf(
"HUAWEI" to 4,
"XIAOMI" to 1
)
private val POWER_SAVE_MODE_SETTING_NAMES = arrayOf(
"SmartModeStatus", // huawei setting name
"POWER_SAVE_MODE_OPEN" // xiaomi setting name
)
private val POWER_SAVE_MODE_CHANGE_ACTIONS = arrayOf(
"huawei.intent.action.POWER_MODE_CHANGED_ACTION",
"miui.intent.action.POWER_SAVE_MODE_CHANGED"
)
private const val monitorViaBroadcast = true
/**
* Monitor power save mode change, only support following devices
* * Xiaomi
* * Huawei
*/
fun monitorPowerSaveModeChange(context: Context, powerSaveModeChangeListener: PowerSaveModeChangeListener) {
if (Build.MANUFACTURER.toUpperCase(Locale.getDefault()) !in POWER_SAVE_MODE_VALUES.keys) {
Log.w(TAG, "monitorPowerSaveModeChange: doesn't know how to monitor power save mode change for ${Build.MANUFACTURER}")
}
if (monitorViaBroadcast) {
context.registerReceiver(object : BroadcastReceiver() {
override fun onReceive(context: Context?, intent: Intent?) {
powerSaveModeChangeListener.onPowerSaveModeChanged()
}
}, IntentFilter().also {
for (a in POWER_SAVE_MODE_CHANGE_ACTIONS) {
it.addAction(a)
}
})
} else {
val contentObserver = object : ContentObserver(null) {
override fun onChange(selfChange: Boolean) {
super.onChange(selfChange)
powerSaveModeChangeListener.onPowerSaveModeChanged()
}
}
for (name in POWER_SAVE_MODE_SETTING_NAMES) {
context.contentResolver.registerContentObserver(
Uri.parse("content://settings/system/${name}"), false, contentObserver)
}
}
}
/**
* Check the system is currently in power save mode
* #see [PowerManager.isPowerSaveMode]
*/
fun isPowerSaveMode(context: Context): Boolean {
if (Build.MANUFACTURER.toUpperCase(Locale.getDefault()) in POWER_SAVE_MODE_VALUES.keys) {
return isPowerSaveModeCompat(context)
}
val powerManager = context.getSystemService(Context.POWER_SERVICE) as? PowerManager
return powerManager?.isPowerSaveMode ?: false
}
private fun isPowerSaveModeCompat(context: Context): Boolean {
for (name in POWER_SAVE_MODE_SETTING_NAMES) {
val mode = Settings.System.getInt(context.contentResolver, name, -1)
if (mode != -1) {
return POWER_SAVE_MODE_VALUES[Build.MANUFACTURER.toUpperCase(Locale.getDefault())] == mode
}
}
return false
}
}

Each oem modifies the SDK to suit their needs . Huawei devices don't use the default power saver function , instead they use something called "Protected apps". Protected apps are set of apps which are allowed to run even when the screen is turned off. So that's the reason it always returns false . Its better to throw a intent to protected apps screen but there is no way to know if your app is added to the protected apps list.
What is protected apps ?

I've found a way to manually request current Huawei Power Mode state and receive change events by adding a custom action to the IntentFilter:
(Note tested only on Huawei P20 Lite (ANE-LX3) # EMUI 8.0.0)
// Manually request Power Save Mode:
public Boolean isPowerSaveMode(Context context) {
if (Build.MANUFACTURER.equalsIgnoreCase("Huawei")) {
return isPowerSaveModeHuawei(context);
} else {
return isPowerSaveModeAndroid(context);
}
}
#TargetApi(21)
private Boolean isPowerSaveModeAndroid(Context context) {
boolean isPowerSaveMode = false;
if (android.os.Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
PowerManager pm = (PowerManager) context.getSystemService(Context.POWER_SERVICE);
if (pm != null) isPowerSaveMode = pm.isPowerSaveMode();
}
return isPowerSaveMode;
}
private Boolean isPowerSaveModeHuawei(Context context) {
try {
int value = android.provider.Settings.System.getInt(context.getContentResolver(), "SmartModeStatus");
return (value == 4);
} catch (Settings.SettingNotFoundException e) {
// Setting not found? Return standard android mechanism and hope for the best...
return isPowerSaveModeAndroid(context);
}
}
// Listening for changes in Power Save Mode
public void startMonitoringPowerSaveChanges(Context context) {
if (android.os.Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
if (mPowerSaveChangeReceiver != null) {
return;
}
// Register for PowerSaver change updates.
mPowerSaveChangeReceiver = new PowerSaveChangeReceiver();
// Registering the receiver
IntentFilter filter = new IntentFilter();
filter.addAction(PowerManager.ACTION_POWER_SAVE_MODE_CHANGED);
// Add custom huawei action
filter.addAction("huawei.intent.action.POWER_MODE_CHANGED_ACTION");
if (android.os.Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
filter.addAction(android.provider.Settings.ACTION_IGNORE_BATTERY_OPTIMIZATION_SETTINGS);
}
context.registerReceiver(mPowerSaveChangeReceiver, filter);
}
}
#TargetApi(21)
class PowerSaveChangeReceiver extends BroadcastReceiver {
public void onReceive(Context context, Intent intent) {
boolean isPowerSaveMode = false;
// Oh, Huawei...why don't you play by the same rules as everyone else?
if (intent.getAction().equals("huawei.intent.action.POWER_MODE_CHANGED_ACTION")) {
Bundle extras = intent.getExtras();
if ((extras != null) && extras.containsKey("state")) {
int state = intent.getExtras().getInt("state");
isPowerSaveMode = (state == 1); // ON=1; OFF=2
}
} else {
PowerManager pm = (PowerManager) context.getSystemService(Context.POWER_SERVICE);
isPowerSaveMode = pm.isPowerSaveMode();
}
Log.d("MyTag", "[powersavechange] isPowerSaveMode? " + isPowerSaveMode);
}
}

I have faced new the same problem while inmplementation handheld and wearable devices.
The only solution I found is to disable battery saver mode for all apps.
I would suggest to detect the result of your methods after disabling such mode for all apps. This bug appear only on Huawei. Awful vendor.

private void isPowerSaveModeHuaweiXiaomi(){
if (Build.MANUFACTURER.equalsIgnoreCase("Xiaomi")) {
try {
int value = android.provider.Settings.System.getInt(getContext().getContentResolver(), "POWER_SAVE_MODE_OPEN");
} catch (Settings.SettingNotFoundException e) {
Log.d("Valor modo bateria:", "Error");
}
}else if (Build.MANUFACTURER.equalsIgnoreCase("Huawei")){
try {
int value = android.provider.Settings.System.getInt(getContext().getContentResolver(), "SmartModeStatus");
} catch (Settings.SettingNotFoundException e) {
Log.d("Valor modo bateria:", "Error");
}
}
}

On new Huawei devices such as Huawei P30 lite for instance the solution to this question is unknown as for now (27.12.2021). calling getInt with the key "SmartModeStatus" will throw a key unknown exception. Therefore the best we can do is the following.
private string HuaweiPowerSaveModeSettingsName = "SmartModeStatus";
private int HuaweiPowerSaveModeValue = 4;
public bool IsBatterySaverEnabled
=> Build.Manufacturer?.ToUpper() == "HUAWEI" ? GetIsBatterySaverEnabledHuawei() : GetIsBatterySaverEnabledAllDevicesExceptHuawei();
private bool GetIsBatterySaverEnabledAllDevicesExceptHuawei()
{
return PowerManager.FromContext(Application.Context)?.IsPowerSaveMode ?? false;
}
private bool GetIsBatterySaverEnabledHuawei()
{
try
{
var mode = Settings.System.GetInt(Application.Context.ContentResolver, HuaweiPowerSaveModeSettingsName);
return HuaweiPowerSaveModeValue == mode;
} catch (Exception e)
{
return GetIsBatterySaverEnabledAllDevicesExceptHuawei();
}
}

For huawei vtr-al00, SmartModeStatus 1 could be ultra save mode or the normal mode. I've used reflection to handle this.
final int _HX = Build.MANUFACTURER.equalsIgnoreCase("Xiaomi")?2
:Build.MANUFACTURER.equalsIgnoreCase("Huawei")?1
:0;
// “No Kotlin”
private boolean isPowerSaveModeCompat(){
if(Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP
&& powerManager.isPowerSaveMode()) { // hopefully...
return true;
}
if (_HX==0) {
return false;
}
else if (_HX==1) {
try {
int value = Settings.System.getInt(getContentResolver(), "SmartModeStatus");
CMN.debug("isPowerSaveModeCompat::huawei::"+value);
// value 4==Save Mode; 1==Ultra Save Mode==Normal Mode;
// ( tested on my huawei vtr-al00 )
if(value==4) {
return true;
}
if(value==1) {
// what if Ultra save mode???
// https://github.com/huaweigerrit
// https://github.com/SivanLiu/HwFrameWorkSource
// https://stackoverflow.com/questions/2641111/where-is-android-os-systemproperties
// Class sysProp= Class.forName("android.os.SystemProperties");
// Method sysProp_getBool = sysProp.getMethod("getBoolean", new Class[]{String.class, boolean.class});
// Object[] parms = new Object[]{"sys.super_power_save", false};
// CMN.debug("huawei::UltraPowerSave::", sysProp_getBool.invoke(null, parms));
// CMN.debug("huawei::UltraPowerSave::", getSystemProperty("sys.super_power_save"));
return "true".equals(getSystemProperty("sys.super_power_save"));
}
} catch (Exception e) {
CMN.debug(e);
}
}
else if (_HX==2){
try {
int value = Settings.System.getInt(getContentResolver(), "POWER_SAVE_MODE_OPEN");
CMN.debug("isPowerSaveModeCompat::xiaomi::"+value);
// dont have xiaomi. not tested.
return value==1;
} catch (Exception e) {
CMN.debug(e);
}
}
// else if...
return false;
}
// https://stackoverflow.com/questions/9937099/how-to-get-the-build-prop-values
public String getSystemProperty(String key) {
String value = null;
try {
value = (String) Class.forName("android.os.SystemProperties")
.getMethod("get", String.class).invoke(null, key);
} catch (Exception e) {
e.printStackTrace();
}
return value;
}
Java is just shorter kotlin, even with so many comments and dirty tests!
:)

Android Google Play Billing - querySkuDetailsAsync resurning empty list

I have an Android project where I want to use com.android.billingclient.api version 4.0.0, which would replace an old billing library that google doesn't allow any more (com.anjlab.android.iab.v3). I've implemented the methods for a one-time purchase, but when querying the SKU Details with billingClient.querySkuDetailsAsync using the SKU string for the product, I get an empty result set. I've been assured that the SKU is correct, so I don't know where the error might be.
Also, the old implementation required to provide a license key, which isn't the case with the new library. Do I need to define it somewhere else in the app?
Here's the code where it fails:
List<String> skuList = new ArrayList<>();
skuList.add(SKU_ID);
SkuDetailsParams.Builder params = SkuDetailsParams.newBuilder();
params.setSkusList(skuList).setType(SkuType.INAPP);
final Activity v = this;
billingClient.querySkuDetailsAsync(params.build(), new SkuDetailsResponseListener() {
#Override
public void onSkuDetailsResponse(BillingResult billingResult, List<SkuDetails> skuDetailsList) {
Has anyone a suggestion what to do?

This is how I query the SKU details within my app.
You can try to use this example and see if this works for you.
billingClient.startConnection(new BillingClientStateListener() {
#Override
public void onBillingSetupFinished(#NonNull BillingResult billingResult) {
Log.d(TAG, "Connection finished");
if (billingResult.getResponseCode() == BillingClient.BillingResponseCode.OK) {
// The BillingClient is ready. You can query purchases here.
List<String> skuList = new ArrayList<> ();
skuList.add(ITEM_SKU_ADREMOVAL);
SkuDetailsParams.Builder params = SkuDetailsParams.newBuilder();
params.setSkusList(skuList).setType(BillingClient.SkuType.INAPP);
billingClient.querySkuDetailsAsync(params.build(),
(billingResult1, skuDetailsList) -> {
// Process the result.
if (billingResult1.getResponseCode() == BillingClient.BillingResponseCode.OK && skuDetailsList != null) {
for (Object skuDetailsObject : skuDetailsList) {
skuDetails = (SkuDetails) skuDetailsObject;
String sku = skuDetails.getSku();
String price = skuDetails.getPrice();
if (ITEM_SKU_ADREMOVAL.equals(sku)) {
removeadsPrice = price;
}
else {
Log.d(TAG,"Sku is null");
}
}
Log.d(TAG, "i got response");
Log.d(TAG, String.valueOf(billingResult1.getResponseCode()));
Log.d(TAG, billingResult1.getDebugMessage());
}
else if (billingResult1.getResponseCode() == BillingClient.BillingResponseCode.ERROR) {
Toast.makeText(MainActivity.this, "Error in completing the purchase!", Toast.LENGTH_SHORT).show();
}
});
}
else if (billingResult.getResponseCode() == BillingClient.BillingResponseCode.SERVICE_TIMEOUT) {
Toast.makeText(MainActivity.this, "Service timeout!", Toast.LENGTH_SHORT).show();
}
else {
Toast.makeText(MainActivity.this, "Failed to connect to the billing client!", Toast.LENGTH_SHORT).show();
}
}
#Override
public void onBillingServiceDisconnected() {
restartConnection();
}
});

Getting this one working properly depends on several different factors
Have you published your app to Play Console or at least to an
internal track or something?
Do you have active products or subscriptions on your Google Play
Console?
Have you configured your licensed testers?
Please see the documentation for more info.

How to get PaymentMethodNonce and deviceData on Braintree Android PayPal Vault Payment

Am trying to implement Braintree Vault PayPal payment, the problem am facing here is getting the paymentMethodNonce my event listener createdListener to capture nonce doesn't get called using vault, but everything works fine using checkout. I can't charge customer without a paymentMethodNonce, please can anyone assist me.
mBraintreeFragment = BraintreeFragment.newInstance(this,"TOKEN_FROM_SERVER");
PayPalRequest request = new PayPalRequest().localeCode("US").billingAgreementDescription("Your agreement description");
PayPal.requestBillingAgreement(mBraintreeFragment, request);
mBraintreeFragment.addListener(createdListener);
mBraintreeFragment.addListener(cancelListener);
mBraintreeFragment.addListener(errorListener);
DataCollector.collectDeviceData(mBraintreeFragment, new BraintreeResponseListener<String>() {
#Override
public void onResponse(String deviceData) {
Log.e("PayPal", deviceData);
try {
JSONObject json = new JSONObject(deviceData);
deviceDataInfo = json.getString("correlation_id");
Log.e("PayPal", deviceDataInfo);
} catch (JSONException e) {
e.printStackTrace();
}
}
});
My Listeners
PaymentMethodNonceCreatedListener createdListener = new PaymentMethodNonceCreatedListener() {
#Override
public void onPaymentMethodNonceCreated(PaymentMethodNonce paymentMethodNonce) {
String nonce = paymentMethodNonce.getNonce();
Log.d("PayPal", "nonce id " + nonce);
}
};
BraintreeCancelListener cancelListener = new BraintreeCancelListener() {
#Override
public void onCancel(int requestCode) {
Log.d("CreditCard", "Braintree Error Code " + requestCode);
}
};
BraintreeErrorListener errorListener = new BraintreeErrorListener() {
#Override
public void onError(Exception error) {
if (error instanceof ErrorWithResponse) {
ErrorWithResponse errorWithResponse = (ErrorWithResponse) error;
BraintreeError cardErrors = errorWithResponse.errorFor("creditCard");
if (cardErrors != null) {
List<BraintreeError> errors = cardErrors.getFieldErrors();
String err = Objects.requireNonNull(errors.get(0).getMessage());
Log.d("CreditCard", errors.toString());
}
}
}
};

Instead of adding manually your listeners to that request, it's better to just implement the interface from braintree.
For example, if you want to use the onPaymentMethodNonceCreated() just add "implements PaymentMethodNonceCreatedListener" after your class name.
public class "YourClass" implements PaymentMethodNonceCreatedListener {
//...
}
And then override the method that now the Android Studio is warning you:
#Override
public void onPaymentMethodNonceCreated(PaymentMethodNonce paymentMethodNonce) {
String nonce = paymentMethodNonce.getNonce();
//...
}
This way you can go for everyone of your listeners! Good luck!

Parse: Duplicate records for the a single saveInBackground Call

I have a single incident where a complete duplicate of a entry was made into the database (the same user comment appeared twice). They had different object IDs but were otherwise the exact same. It was slower than usual to finish the posting and only happened once out of dozens of comments, so I want to say it was a Parse issue during the saveInBackground call. Even so, I expect a service like Parse to be a little more robust. As my first time working with Android though, I also can't be sure nothing is wrong on my end. Any help? Also just any criticisms? This is the method called when the user hits a comment submission button:
private void submitComment() {
String text = commentText.getText().toString().trim();
Intent intent = getIntent();
String ID = intent.getStringExtra("imageID");
String parentID = intent.getStringExtra("parent");
// Set up a progress dialog
final ProgressDialog loadingDialog = new ProgressDialog(CommentSubmitActivity.this);
loadingDialog.setMessage(getString(R.string.publishing_comment));
loadingDialog.show();
Comment comment = new Comment();
comment.setText(text);
comment.setUser((ParseUser.getCurrentUser()));
if (ID.equals("#child")) {
comment.setParent(parentID);
comment.setImage("#child");
ParseQuery<ParseObject> query = ParseQuery.getQuery("Comment");
query.getInBackground(parentID, new GetCallback<ParseObject>() {
public void done(ParseObject parentComment, ParseException e) {
if (e == null) {
int numChild = parentComment.getInt("numChild");
parentComment.put("numChild", ++numChild);
parentComment.saveInBackground();
} else {
Log.d("numChild: ", "error");
}
}
});
} else {
comment.setImage(ID);
comment.put("numChild", 0);
ParseQuery<ParseObject> query = ParseQuery.getQuery("ImageUpload");
query.getInBackground(ID, new GetCallback<ParseObject>() {
public void done(ParseObject image, ParseException e) {
if (e == null) {
int numComments = image.getInt("numComments");
image.put("numComments", ++numComments);
image.saveInBackground();
} else {
Log.d("numComments: ", "error");
}
}
});
}
comment.saveInBackground(new SaveCallback() {
#Override
public void done(ParseException e) {
if (e == null) {
loadingDialog.dismiss();
finish();
}
}
});
}

I encountered similar problem like yours.
I created an app where user can create account and add photo to it and list of objects (friends in my case).
Once when I was testing it user was created twice.
I went through my code and my my suspicions are connected with async calls.
I see that you use asynchronous parse api in you application so no fragment of code is waiting for response and blocking the rest of operations.
You cannot control when parse server will response.
What I did I just put all synchronous requests in my custom async code (AsyncTask in Android).
Hope that my answer somehow meeets your expectations.

Unable to change language in Android default TextToSpeech

I was trying to use:
_tts = new TextToSpeech(this, this);
_tts.setLanguage(new Locale("en"));
The result is always -2 (LANG_NOT_SUPPORTED), so I thought that I made a mistake in the string given to the constructor.
Then I tried using (Obviously English is supported, no?)
_tts.setLanguage(Locale.US);
But to no avail and with the same result.
Why can't I change the language of the TTS engine?
My device's Android is version 2.3, TTS engine is PICO.
public void onInit(final int status) {
if (status == TextToSpeech.SUCCESS) {
_init = true; Log.d(TAG, "TTS init completed succesfully.");
setQueueMode(TextToSpeech.QUEUE_FLUSH);
}
}

The problem is that you are trying to set the language before initializing the TTS engine, instead of setting the language after creating the object do it at onInit callback.
public void onInit(final int status) {
if (status == TextToSpeech.SUCCESS) {
_init = true;
Log.d(TAG, "TTS init completed succesfully.");
int result = _tts.setLanguage(Locale.US);
}
}